My son had asthma like symptoms due to a lung viral infection when he was 10 months old. I am also a registered nurse. I don't think there is any way you can tell when and if this will always happen. To decrease the incidences make you house allergy free: keep dust to a minimum, no pets, remove rugs, no smoking, decrease cow's milk/products. Increase baby's immunity (whole/organic foods, vitamins, decrease processed food, decrease whole milk and other dairy products). See Dr. Weil's web site (www.drweil.com) for more information. My son is now asthma free. Asthma is life threatening. It is important to prevent it!